If you have a T5008 summary, you can enter these in TurboTax in the Capital Gains & Capital Gains Deduction Profile.
You can enter the dispositions individually or as one transaction in the Capital Gains & Capital Gains Deduction Profile. You can access this from the sidebar of TurboTax by clicking on Income > Investments > Capital Gains & Capital Gains Deduction Profile. Check the box next to Sold stocks, bonds, real estate, other capital property, and continue until you reach the Capital Gains page. Here you can enter more details on your dispositions such as dates, number of units, etc.